code: def on_rep_start(self):
      self.stat_aggregates["times"]["reps"].append(datetime.now())
      super().on_rep_start()
  
imports: from hyperparameter_hunter.callbacks.bases import BaseAggregatorCallback
  from datetime import datetime
  import numpy
label_desc: Use image node_id 2 for calling the AggregatorTimes obj's underlying member method code with example usage: obj.on_rep_start() without return types